Master Battery MasterPower Omega LV 6KW User manual

Omega LV 6KW
PV Inverter Version: 1.1
User Manual

Table Of Contents
1. Introduction ....................................................................................................1
2. Important Safety Warning.................................................................................2
3. Unpacking & Overview .....................................................................................4
3-1. Packing List .............................................................................................4
3-2. Product Overview .....................................................................................4
4. Installation ......................................................................................................5
4-1. Precaution ...............................................................................................5
4-2. Selecting Mounting Location......................................................................5
4.3. Mounting Unit ..........................................................................................5
5. Grid (Utility) Connection ...................................................................................7
5-1. Preparation..............................................................................................7
5-2. Connecting to the AC Utility.......................................................................7
6. Generator Connection.......................................................................................8
6-1. Preparation..............................................................................................8
6-2. Connecting to the Generator Input.............................................................8
7. PV Module (DC) Connection ..............................................................................9
8. Battery Connection......................................................................................... 12
9. Load (AC Output) Connection.......................................................................... 13
8-1. Preparation............................................................................................ 13
8-2. Connecting to the AC output ................................................................... 13
9. Communication.............................................................................................. 15
9-1. Pin Assignment for RS-232 Communication Port........................................ 16
9-2. Pin Assignment for BMS Communication Port ............................................ 16
9-3. Dry Contact Signal.................................................................................. 16
10. Commissioning .............................................................................................. 18
11. Initial Setup................................................................................................... 19
12. Operation ...................................................................................................... 30
12-1. Interface.............................................................................................. 30
12-2. LCD Information Define......................................................................... 30
12-3. Touchable function keys ........................................................................ 32
12-4. LCD Setting.......................................................................................... 33
12-5. Query Menu Operation.......................................................................... 41
12-6. Operation Mode & Display ..................................................................... 46
13. Charging Management ................................................................................... 50
14. Maintenance & Cleaning ................................................................................. 52
15. Trouble Shooting............................................................................................ 53
15-1. Warning List......................................................................................... 53
15-2. Fault Reference Codes .......................................................................... 54
16. Specifications ................................................................................................ 56
Appendix I: Parallel Installation Guide...................................................................... 58
Appendix II: The Wi-Fi Operation Guide................................................................... 65

1
1. Introduction
This hybrid PV inverter can provide power to connected loads by utilizing PV power,
utility power and battery power.
Hybrid inverter
Battery
Figure 1 Basic hybrid PV System Overview
Depending on different power situations, this hybrid inverter is designed to generate
continuous power from PV solar modules (solar panels), battery, and the utility. When
MPP input voltage of PV modules is within acceptable range (see specification for the
details), this inverter is able to generate power to feed the grid (utility) and charge
battery. This inverter is only compatible with PV module types of single crystalline and
poly crystalline. Do not connect any PV array types other than these two types of PV
modules to the inverter. Do not connect the positive or negative terminal of the solar
panel to the ground. See Figure 1 for a simple diagram of a typical solar system with this
hybrid inverter.
PV modules
Distribution Box
Electric grids
Load

2
2. Important Safety Warning
Before using the inverter, please read all instructions and cautionary
markings on the unit and this manual. Store the manual where it can be
accessed easily.
This manual is for qualified personnel. The tasks described in this manual may be
performed by qualified personnel only.
General Precaution-
WARNING! Before installing and using this inverter, read all instructions and cautionary
markings on the inverter and all appropriate sections of this guide.
WARNING! Normally grounded conductors may be ungrounded and energized when a
ground fault is indicated.
WARNING! This inverter is heavy. It should be lifted by at least two persons.
CAUTION! Authorized service personnel should reduce the risk of electrical shock by
disconnecting AC, DC and battery power from the inverter before attempting any
maintenance or cleaning or working on any circuits connected to the inverter. Turning off
controls will not reduce this risk. Internal capacitors can remain charged for 5 minutes
after disconnecting all sources of power.
CAUTION! Do not disassemble this inverter yourself. It contains no user-serviceable
parts. Attempt to service this inverter yourself may cause a risk of electrical shock or fire
and will void the warranty from the manufacturer.
CAUTION! To avoid a risk of fire and electric shock, make sure that existing wiring is in
good condition and that the wire is not undersized. Do not operate the Inverter with
damaged or substandard wiring.
Conventions used:
WARNING! Warnings identify conditions or practices that could result in personal
injury;
CAUTION! Caution identify conditions or practices that could result in damaged to the
unit or other equipment connected.

3
CAUTION! Under high temperature environment, the cover of this inverter could be hot
enough to cause skin burns if accidentally touched. Ensure that this inverter is away
from normal traffic areas.
CAUTION! Use only recommended accessories from installer. Otherwise, not-qualified
tools may cause a risk of fire, electric shock, or injury to persons.
CAUTION! To reduce risk of fire hazard, do not cover or obstruct the cooling fan.
CAUTION! Do not operate the Inverter if it has received a sharp blow, been dropped, or
otherwise damaged in any way. If the Inverter is damaged, please call for an RMA
(Return Material Authorization).
CAUTION! AC breaker, DC switch and Battery circuit breaker are used as disconnect
devices and these disconnect devices shall be easily accessible.
Symbols used in Equipment Markings
Refer to the operating instructions
Caution! Risk of danger
Caution! Risk of electric shock
Caution! Risk of electric shock. Energy storage timed
discharge for 5 minutes.
Caution! Hot surface
Before working on this circuit
-Isolate inverter/Uninterruptible Power System (UPS)
-Then check for Hazardous Voltage between all
terminals including the protective earth.
Risk of Voltage Backfeed

4
3. Unpacking & Overview
3-1. Packing List
Before installation, please inspect the unit. Be sure that nothing inside the package is
damaged. You should have received the following items inside of package:
Inverter unit RS-232 cable Parallel cable Share current wires Manual Software CD
3-2. Product Overview
1) PV connectors
2) AC Grid connectors
3) Battery connectors
4) AC output connectors (Load
connection)
5) Generator input / Programmable
load output
6) External sensor port (reserved)
7) Dry contact & USB communication
port
8) BMS & RS-232 communication port
9) LCD display panel (Please check
section 10 for detailed LCD
operation)
10) Operation buttons
11) Current sharing port
12) Parallel communication port
13) PV switch
14) Cold start button

5
4. Installation
4-1. Precaution
This hybrid inverter is designed for indoor or outdoor use (IP65), please make sure the
installation site meets below conditions:
Not in direct sunlight
Not in areas where highly flammable materials are stored.
Not in potential explosive areas.
Not in the cool air directly.
Not near the television Antenna or antenna cable.
Not higher than altitude of about 2000 meters above sea level.
Not in environment of precipitation or humidity (>95%).
Please AVOID direct sunlight, rain exposure, snow laying up during installation and
operation.
4-2. Selecting Mounting Location
Please select a vertical wall with load-bearing capacity for installation, appropriate
for installation on concrete or other non-flammable surfaces.
The ambient temperature should be between -25~60℃to ensure optimal
operation.
Be sure to keep other objects and surfaces as shown in the diagram to guarantee
sufficient heat dissipation and have enough space for removing wires.
For proper air ventilation to dissipate heat, allow a clearance of approx. 50cm to
the side and approx. 50cm above and below the unit. And 100cm toward the front.
4.3. Mounting Unit
Installation to the wall should be implemented with the proper screws. After that, the
device should be bolted on securely.
The inverter only can be used in a CLOSED ELECTRICAL OPERATING AREA. Only service
person can enter into this area.
WARNING!! Remember that this inverter is heavy! Please be carefully when lifting out
from the package.
WARNING!! FIRE HAZARD.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE
ONLY.

6
1. Fix four screws as shown in the
chart. The reference tightening
torque is 35 N.m.
2. Raise the inverter and place it over
the four screws.
3. Check if the inverter is firmly
secured.

7
5. Grid (Utility) Connection
5-1. Preparation
NOTE 1: The overvoltage category of the AC input is III. It should be connected to the
power distribution.
NOTE 2: Before connecting to grid, please install a separate AC breaker between
inverter and grid. This will ensure the inverter can be securely disconnected during
maintenance and fully protected from over current. The recommended of AC breaker is
40A/300V.
WARNING! It's very important for system safety and efficient operation to use
appropriate cable for grid (utility) connection. To reduce risk of injury, please use the
proper recommended cable size as below.
Suggested cable requirement for AC wire
Nominal Grid Voltage
120VAC per phase
Conductor cross-section (mm2)
10-16
AWG no.
8-6
5-2. Connecting to the AC Utility
Please follow below steps to implement AC input connection:
1. Before making AC input connection, be sure to open DC protector or disconnector
first.
2. Remove insulation sleeve 7mm for four conductors.
3. Insert AC input wires according to polarities indicated on terminal block and tighten
the terminal screws. Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L1→LINE (black)
L2→LINE (brown)
N→Neutral (blue)
WARNING:
Be sure that AC power source is disconnected before attempting to
hardwire it to the unit.

8
6. Generator Connection
There are two functions with this port:
Allows generator input as power source
Allows second AC output connect. This output can be turned On or Off by setting
battery voltage.
6-1. Preparation
NOTE 1: The overvoltage category of the AC input is III. It should be connected to the
power distribution.
NOTE 2: Before connecting to grid, please install a separate AC breaker between
inverter and grid. This will ensure the inverter can be securely disconnected during
maintenance and fully protected from over current. The recommended of AC breaker is
40A/300V.
WARNING! It's very important for system safety and efficient operation to use
appropriate cable for generator connection. To reduce risk of injury, please use the
proper recommended cable size as below.
Suggested cable requirement
Nominal Grid Voltage
120VAC per phase
Conductor cross-section (mm2)
10-16
AWG no.
8-6
6-2. Connecting to the Generator Input
Please follow below steps to implement generator input connection:
1. Before making generator input connection, be sure to open DC protector or
disconnector first.
2. Remove insulation sleeve 7mm for four conductors.
3. Insert input wires according to polarities indicated on terminal block and tighten the
terminal screws. Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L1→LINE (black)
L2→LINE (brown)
N→Neutral (blue)
WARNING:
Be sure that generator power source is disconnected before attempting
to hardwire it to the unit.